本文认为岩石冲刷是由顺着岩石面流动的水流所引起的.这种冲刷经常发生在溢洪道下游、泄洪陡槽、消力池以及导流隧洞和明渠中.本试验所根据的假定为:岩石在某些方向具有裂缝,并且水流能流进裂缝,使裂缝内水压力升高.当由于水流引起的压力作用在岩石块顶面的同时,裂缝内的水压力作用在岩块的侧面和底面.如果扬压力不能被岩块的重量所平衡,且裂缝内又没有其它力阻止其运动,则 This paper argues that rock scour is caused by the flow of water flowing along the rock face, and this scour often occurs downstream of the spillway, in spillway chutes, troughs, as well as in diversion tunnels and open channels. This test is based on the assumption that rock In some directions there is a crack and the water flow can flow into the crack causing the water pressure in the crack to rise.While the pressure due to water flow acts on the top of the rock mass the water pressure in the fracture acts on the side and bottom of the rock mass If the uplift pressure can not be balanced by the weight of the block and there is no other force in the crack to prevent its movement